JP2917701B2 - Automatic bath equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic bath apparatus for performing automatic hot water filling to a set water level using a water level sensor without using a water amount sensor.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 63-153355 discloses an example of an automatic bath apparatus in which a water level sensor is used without a water level sensor to automatically fill a set water level. The relationship between the detection value P of the water level sensor and the bathtub water level L in this example will be described with reference to FIG.

In FIG. 5, the vertical axis represents the output value P of the water level sensor, and the horizontal axis represents the water level L from the bottom of the bathtub. Pc is the detection value of the water level sensor when the water level is lower than the bath adapter, PB is the detection value of the water level sensor when the bathtub water level is LB above the bus adapter, and PS is the bathtub water level when the bathtub is set. This is the detection value of the water level sensor when it becomes LS.

That is, when the bathtub water level reaches the upper part of the bath adapter, the output of the water level sensor rises from PC to PB, and thereafter, the output value of the water level sensor rises proportionally according to the rise amount of the bathtub water level. When the detection value of the water level sensor detects PS indicating the bathtub set water level LS, the automatic hot water filling is terminated.

[0005]

However, in the above-mentioned conventional example, in the automatic hot water filling, it is detected that the water level has reached the upper part of the bus adapter, and the hot water is dropped to the set water level based on the detected water level. there were. Therefore, in automatic hot water filling, in order to drop hot water corresponding to the water level difference between the set water level and the water level above the bus adapter, the rising water level above the upper bus adapter can be accurately detected by the water level sensor. No measures are taken for the lower water level, and the water level setting in the automatic hot water filling will be inaccurate unless the water level sensor is installed at the same position as the upper part of the bus adapter.

[0006] Actually, the fixture mounting height when the fixture is installed varies depending on the construction conditions. Therefore, when automatic filling is performed using only a water level sensor, the water level after completion of the automatic filling also varies. As a result, there was a problem that the set water level became insufficient and the bath tub overflowed.

In view of the above, a number of methods have been filed in the past for automatic filling using a water level sensor and a water level sensor using a water level sensor in addition to a water level sensor. However, the increase in cost due to the addition of the water level sensor cannot be denied. . Therefore, an object of the present invention is to provide an automatic bath apparatus capable of accurately setting a water level in automatic hot water filling using a conventional configuration, that is, using only a water level sensor without using a water level sensor.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problem by dropping water from a bathtub and a device body located at a remote position into a bathtub through a circulation pipe for reheating and supplying hot water to the circulation pipe. After the power is turned on, the automatic water filling switch is turned on and the first automatic water filling is started, and after the automatic water filling starts, the water level sensor is higher than the connection between the circulation pipe and the bathtub. A time T1 until the water level h1 is detected is obtained, the output T1 of the water level sensor at the time T1 and the time T1 are stored, the automatic filling is continued even after the water level h1 is detected, and the water level is detected after the water level h1 is detected. The time T2 required for the constant water level h2 to rise is obtained, the water level h2, the time T2, and the water level sensor output value P2 at the time T2 are stored. The stored water level h2, time T1, and time 2, the water level h1 is calculated and stored, and the detection value Ps of the water level sensor at the bathtub set water level Hs is calculated using the detection values P1, P2 of the water level sensor and the water levels h1, h2 to automatically fill the bath. It is characterized by performing.

[0009]

According to the present invention, the water level from the bottom of the bathtub to the upper part of the bus adapter is calculated and stored by the above configuration, the calculated and stored water level, the detection value of the water level sensor when the water reaches the upper part of the bus adapter, and the Using the detection value of the water level sensor when the constant water level rises and the constant water level, the value of the water level sensor at the set water level at the time of automatic filling is calculated and corrected to obtain the bathtub setting water level at the time of automatic filling. Therefore, it is possible to accurately set the water level at the time of automatic filling by using only the water level sensor without using the water amount sensor and irrespective of the installation height of the appliance.

[0010]

1 is a block diagram of an automatic bath apparatus according to the present invention. Reference numeral 1 denotes an automatic bath apparatus. Water from city water passes through a main waterway 2 and is supplied to another tap such as a kitchen by a heat exchanger 3 arranged in the main waterway 2. Heater 3 is heated by burner 4
The amount of gas to the burner 4 is adjusted by adjusting the opening of the proportional valve 5.

The main water channel 2 is connected to the drop hot water supply channel 6, and the electromagnetic valve 7 provided in the drop hot water channel 6 is opened so that hot water can be dropped into the bathtub. The dropping hot water supply path 6 is connected to a reheating circuit 8, a pump 9 for circulating bathtub hot water, a heat exchanger 10 for heating the bathtub hot water, a water level sensor 11 for detecting a bathtub water level, and an upstream from the reheating circuit 8. Thermistors 12 for detecting the temperature of the bath water are arranged in order.

The reheating circuit 8 is connected to the bathtub 16 via the bus adapter 15, h1 is the water level from the bottom of the bathtub to the top of the bus adapter 15, and h2 and h3 are the water levels from the top of the bus adapter 15. .

Reference numeral 17 denotes a controller for controlling the above-described proportional valve, pump, and the like. The thermistor 12 and the water level sensor 1
A detection value of 1 has been transmitted. 18 is a controller 17
This is a timer provided with a timer function. 19 is a remote controller connected to the controller 17, and 20 is ON
Is an automatic hot water filling switch for starting automatic hot water filling, and 21 is a set temperature controller for setting a bathtub hot water temperature.

FIG. 2 shows the detected value P of the water level sensor 11 and the bathtub 1.
FIG. 6 is a diagram illustrating a relationship with a water level H from the bottom surface of FIG. P0
Is a detection value of the water level sensor until the bathtub water level reaches the upper part of the bus adapter 15, P1 is a detection value of the water level sensor 11 when the water level of the bath adapter 15 reaches the upper water level h1,
2 is the detection value of the water level sensor when the water level reaches (h1 + h2), and P3 is the water level when the bathtub water level reaches the set water level H0 (H0 = h1 + h3) in the first automatic hot water filling after turning on the power. This is the detection value of the sensor. That is, the detection value of the water level sensor starts to rise when it reaches the upper part of the bus adapter, and when the water level sensor detects the set water level H0, the electromagnetic valve 7 is closed to terminate the automatic filling. The detection value P of the water level sensor 11 and the water level H from the bottom of the bathtub 16 in FIG.
FIG. 3 is a sequence diagram shown below, in which control is performed by using the relationship between.

FIG. 3 is a sequence diagram showing the contents of the control of the present invention, which is the sequence at the time of the first automatic filling after the power supply (not shown) is turned on. When the power is turned on, the bathtub 16
There is no hot water inside.

The automatic hot water filling switch 20 is turned on to start automatic hot water filling (S1), the solenoid valve 7 is opened to start dropping hot water into the bathtub 16, and at the same time, the timer 18 is started (S2).

In step 3, it is determined whether or not the detection value of the water level sensor 11 has risen. If the detection value of the water level sensor 11 rises, the water level sensor 1 at the time when the water level starts rising is determined.
The detected value P1 of 1 and the time T1 when the water level starts to rise are stored, the timer 18 is reset and the timer 18 is restarted (S4).

After step 4, it is determined whether or not the detection value of the water level sensor 11 is equal to or higher than P2 (S5), and the water level h2 that has risen from the water level h1 when the detection value of the water level sensor has reached P2.
And the time T2 since the restart of the timer 18 in step 4 is stored in the controller 17 (S
6).

In step 7, the stored time T1
H1 is calculated from the time T2 and the water level h2, and stored in the controller 17 (S7). Where h1 is h1 = A
h2T1 / T2 (A is a correction coefficient in consideration of the spread of the bathtub water surface). That is, in the equation, the water level rise per unit time is regarded as equal, and the water level from the bottom of the bathtub to the top of the bath adapter is calculated and corrected.

In step 8, the water level h3 is calculated, and the detection value P3 of the pressure sensor 10 when the set water level H0 (H0 = h1 + h3) is calculated and corrected (S).
8). That is, h3 and P3 are calculated as follows: h3 = H0 -h1 = H
0−Ah2 T1 / T2..., And P3 = P1 +
(P2-P1) h3 / h2 = P1 + (P2-P1) .times.
(H0-Ah2T1 / T2) / h2 ... That is, in the equation, the detection value P of the water level sensor
However, it uses the fact that after reaching the upper part of the bus adapter, it increases in proportion to the rising water level.

In step 9, it is determined whether or not the detected value P of the water level sensor 11 is equal to or more than the calculated and corrected P3 (S9).
9) If P3 or more, h3 and P3 expressed by the above equations and the equations are stored in the controller 17 (S1).
0), the electromagnetic valve 7 is closed, the pump 9 is turned on, and the heat exchanger 10 is heated to perform reheating (S11).

Here, reheating means heating the bath water to a set temperature. When the reheating is completed, the first automatic hot water filling after power-on is completed (S12).

FIG. 4 is a sequence diagram showing the contents of the control of the automatic hot water filling for the second and subsequent times after the power supply (not shown) is turned on.
When the automatic filling switch 20 is turned on, the automatic filling is started (S21), and a detection value PS of the water level sensor corresponding to the bathtub set water level HS in the second or subsequent automatic filling after power-on is calculated (S22). ). Here, the detected value PS of the water level sensor corresponding to the bathtub set water level HS is, as is apparent from the equation, PS = P1 + (P2-P1) × (H
S-Ah2T1 / T2) / h2 ...

Next, the solenoid valve 7 is opened to start dropping into the bathtub, and it is determined whether or not the detection value P of the water level sensor 10 is equal to or greater than PS (S24).
Is closed and reheating is performed (S25), and the automatic hot water filling is terminated (S26).

That is, in the control sequence of the present invention,
Automatic water filling is performed using the detection value of the water level sensor, but the time it takes to reach the upper part of the bus adapter during the first automatic filling after power-on is measured and stored, and it is kept constant even after the water level reaches the upper part of the bus adapter. The water level rise time is measured and stored, and the water level from the bottom of the bathtub to the top of the bus adapter is calculated and corrected using the constant rise time of the water level. The water level, that is, the water level from the bottom of the bathtub to the level higher than the connection between the circulation pipe and the bathtub can be accurately obtained, and the bathtub set water level after the automatic hot water filling is accurate.

[0026]

According to the present invention, the time T1 required to detect a higher water level h1 from the connection between the circulation pipe and the bathtub and the time T2 required for the water level to rise by a certain level h2 after the detection of the water level h1 are: Since the water level h1 is calculated and corrected based on the constant water level h2, the water level from the bottom of the bathtub to the top of the bath adapter can be accurately obtained regardless of the installation conditions of the appliances. Water level setting can be performed accurately.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an automatic bath apparatus of the present invention.

FIG. 2 is a diagram showing a relationship between an output value P of a water level sensor and a bathtub water level H in the automatic bath apparatus of the present invention.

FIG. 3 is a sequence diagram showing the contents of control according to the present invention.

FIG. 4 is a sequence diagram showing the contents of control according to the present invention.

FIG. 5 is a diagram showing a relationship between an output value P of a water level sensor and a bathtub water level L in a conventional automatic bath apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic bath apparatus 10 Water level sensor 15 Bus adapter 16 Bathtub 18 Timer 20 Automatic bathing switch

Claims (1)

(57) [Claims] 1. An apparatus in which a water level sensor for detecting a bathtub water level is disposed in a bathtub from a device main body located at a remote position from the bathtub through a recirculating pipe for reheating, and a water level sensor for detecting a bathtub water level is provided in the circulation pipe. Turns on the automatic hot water filling switch to start the first automatic hot water filling, obtains a time T1 until the water level sensor detects a high water level h1 from the connection between the circulation pipe and the bathtub after the automatic hot water filling is started, and determines the time T1. T1
And the output value P1 of the water level sensor at the time T1 is stored, the automatic filling is continued even after the detection of the water level h1, and the time T2 required for the water level to rise to a certain level h2 after the detection of the water level h1 is determined. And the time T2 and the time T2
And the stored water level h2, time T1 and time T2 are used to store the water level h1.
Is calculated and stored, and the detection value Ps of the water level sensor at the bathtub set water level Hs is detected by the detection values P1, P2 of the water level sensor.
And automatic water filling by calculating using the water levels h1 and h2.